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Superwide-angle lens optical system, and imaging unit and display unit comprising the same

  • US 20050088762A1
  • Filed: 10/25/2004
  • Published: 04/28/2005
  • Est. Priority Date: 10/24/2003
  • Status: Active Grant
First Claim
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1. A superwide-angle lens optical system, which comprises, in order from an object side thereof, an objective lens group having positive refracting power, a primary image-formation plane formed by said objective lens group, and a relay lens group having positive refracting power, wherein a field stop is located at or near a position of said primary image-formation plane, and condition (1-1) is satisfied:


  • h/fo>

    1.8 



    (1-1) where fo is a focal length of said objective lens group, and h is a diameter of an image circle on said primary image-formation plane.

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